Produzione di magnesia fusa

Fused magnesia has the characteristics of high purity, large crystal grains, dense structure, forte resistenza alle scorie, and good thermal shock stability. It is an excellent high-temperature electrical insulation material and is also used for making high-grade magnesia bricks, mattoni di carbone di magnesia, and unshaped An important raw material for refractory materials. Fused magnesite is widely used in metallurgy, industria chimica, national defense, scientific research, aerospaziale, household appliance components, eccetera.

Fused magnesia physical and chemical properties

The physical and chemical properties of Large Crystal Fused Magnesia (LFM)

Codice prodotto	Composizione chimica (Frazione di massa),%						Particle Bulk Density g/cm’
Codice prodotto	MgO≥	SiO2≤	CaO≤	Fe2O3≤	Al2O3≤	Burn Loss	Particle Bulk Density g/cm’
LFM 99	99.00	0.30	0.60	0.35	0.10	0.08	≥3.51
LFM 98.5	98.30	0.40	0.80	0.45	0.12	0.08	≥3.50
LFM 98A	97.70	0.55	1.10	0.60	0.12	0.10	≥3.50
LFM 98B	97.50	0.60	1.20	0.65	0.15	0.12	≥3.49
LFM 97A	96.80	1.00	2.00	0.70	0.15	0.15	≥3.45
LFM 97B	96.50	1.15	2.30	0.75	0.18	0.20	≥3.42

The physical and chemical properties of High-Calcium Electrically Fused Magnesia (HFM (C/S≥2))

Codice prodotto	Composizione chimica (Frazione di massa),%						Particle Bulk Density g/cm’
Codice prodotto	MgO≥	SiOz≤	CaO≤	Fe2O3≤	Al2O3≤	Burn Loss	Particle Bulk Density g/cm’
HFM 98	97.70	0.60	1.20	0.65	0.12	0.10	3.50
HFM 97	96.80	0.85	1.70	0.75	0.15	0.15	3.48
HFM 96	96.00	1.20	2.40	0.85	0.18	0.18	3.45

The physical and chemical properties of Ordinary Fused Magnesia (FM)

Codice prodotto	Composizione chimica (Frazione di massa),%						Particle Bulk Density g/cm’
Codice prodotto	MgO≥	SiOz≤	CaO≤	Fe2O3≤	Al2O3≤	Burn Loss	Particle Bulk Density g/cm’
FM 98	97.50	1.00	1.50	0.65	0.10	0.10	≥3.50
FM 97	96.50	1.30	2.00	0.70	0.15	0.15	≥3.48
FM 96	95.50	2.50	2.30	0.80	0.18	0.18	≥3.45

The specific production process of fused magnesite

In specific industrial production, the raw materials of fused magnesia of different specifications are also different. Ordinary fused magnesia usually uses magnesite directly as raw material, while large crystalline fused magnesia uses light-burnt magnesium as raw material. The equipment adopts Submerged arc furnaces mostly using three regenerated or non-regenerated graphite. The specific process is: feeding → ignition and lifting of electrode → gradual feeding → smelting (magnesite is sintered and melted by the heat generated by high current) → natural cooling → crushing, classification, and sorting → warehousing.

electric arc furnace production of fused magnesia

Advantages of fused magnesia

It has a complete structure, dense structure, high melting point (up to 2800°C), stable chemical properties, elevata resistenza alla compressione, strong insulation properties, erosion resistance, e resistenza alla corrosione. It is an important raw material for metallurgy, materiali da costruzione, light industry, furnace lining, and bulk materials. It is also an indispensable and important refractory material in steel, cemento, bicchiere, fusione di metalli non ferrosi, e altre industrie.

Main applications of fused magnesite

In the metallurgical refractory industry, it is used to produce auxiliary refractory materials such as high-purity fused magnesia, gunning materials, and ramming materials, as well as special refractory bricks such as flowing steel bricks, mattoni di magnesia, E mattoni cromati di magnesia. It can also be used in vacuum and non-vacuum induction It is used as refractory lining on furnaces and electric arc furnaces. It is an ideal raw material for making magnesium oxide crucibles, furnace bladders, and various high-temperature casings.